What does the `~` symbol do in javascript?

Asked Oct 27 '18 at 16:58

Active Oct 27 '18 at 17:00

Viewed 72 times

What does the ~ symbol do in the ~j and ~rdo?

sc=a=>[a.findIndex(r=>j=~r.indexOf('B')),~j];

It would be executed like this sc(array) where a is an array:

let a = [
  ["B", "A", "A", "A", "A"],
  ["A", "A", "A", "A", "A"],
  ["A", "A", "A", "A", "A"],
  ["A", "A", "A", "A", "A"],
  ["A", "A", "A", "A", "A"]
];

console.log( sc(array) );

This is a solution to http://www.codewars.com/kata/shortest-code-bug-in-apple/javascript

edited Oct 27 '18 at 17:00

asked Oct 27 '18 at 16:58

Alexey Tseitlin

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I search and did not find any duplicates... – Alexey Tseitlin Oct 27 '18 at 17:00
1

I searched and found the duplicate for you. https://stackoverflow.com/a/28757111/362536 – Brad Oct 27 '18 at 17:01
Thanks but how ~ is solving the test on codewar example? not getting how "sequence of 32 bits" is relevant at all here... – Alexey Tseitlin Oct 27 '18 at 17:03
2

Read the specific answer I linked to, with its relevance to `indexOf`. – Brad Oct 27 '18 at 17:09

What does the `~` symbol do in javascript?

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